Magnetic levitation type suspension apparatus

Abstract

Abstract PURPOSE:To enable the stabilized control of a levitation gap and to eliminate electromagnetic noise by controlling the coil current of a levitation side coil unit. CONSTITUTION:A primary coil A on the supporting and fixing side is connected and linked in a guide rail manner to the under surface of the horizontal arm 2 of a support 1. A secondary coil B is provided on a levitation body 5 and a gap detection means for measuring a gap from the primary side coil A is provided moreover. When a three-phase symmetric AC current flows through the primary coil A, said three-phase symmetric AC current flows also through the secondary side coil so that an attraction force without three-phase AC component is generated and said electromagnetic noise disappears. The size of said gap is controlled by changing the current of the secondary side coil B through a feedback signal from said gap detection means. Thus, the regulation of gap can be made freely and automatic positioning characteristics on the levitation side are improved relative to the fixing side.

Inventors

• 👤 Osami Tsukamoto
• 👤 修巳 塚本

Bibliographic Details